Investigators are examining the case of the subway operator who overlooked the body of a Queens woman who fell between rail cars — even though his train’s emergency switch was tripped and it ground to a halt.

Officials at the state Public Transportation Safety Board are analyzing why Arabell Lin’s body was then run over by another 10 Coney Island-bound N trains before it was finally discovered, officials said.

The operator also has a checkered disciplinary history, racking up two rules violations in the past 10 years, NYC Transit officials said. But the MTA would not release the details of the infractions.